Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/themes/ThemeFactory.java @ 3742:467efea19d15

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Added type safety. flys-artifacts/trunk@5425 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 10 Sep 2012 14:38:58 +0000
parents b1912514e0f5
children 8e713e9bb4d7
rev   line source
340
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1 package de.intevation.flys.themes;
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2
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3 import de.intevation.artifacts.common.utils.XMLUtils;
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4 import de.intevation.flys.artifacts.FLYSArtifact;
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5 import de.intevation.flys.artifacts.context.FLYSContext;
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6
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7 import java.util.ArrayList;
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8 import java.util.HashMap;
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9 import java.util.List;
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10 import java.util.Map;
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11
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12 import javax.xml.xpath.XPathConstants;
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13
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14 import org.apache.log4j.Logger;
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15 import org.w3c.dom.Document;
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16 import org.w3c.dom.Element;
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17 import org.w3c.dom.NamedNodeMap;
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18 import org.w3c.dom.Node;
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19 import org.w3c.dom.NodeList;
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20
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21 /**
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22 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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23 *
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24 * Mapping-matching rules:
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25 *
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26 */
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27 public class ThemeFactory {
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28
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29 private static Logger logger = Logger.getLogger(ThemeFactory.class);
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31 /** Trivial, hidden constructor. */
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32 private ThemeFactory() {
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33 }
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34
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35
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36 /**
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37 * Creates a new theme from <i>config</i>.
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38 *
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39 * @param themeCfg The theme config document that is used to fetch parent
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40 * themes.
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41 * @param config The theme config node.
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42 *
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43 * @return a new theme.
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44 */
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45 public static Theme createTheme(Document themeCfg, Node config) {
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46 String name = getName(config);
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47 String desc = getDescription(config);
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48
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49 logger.debug("Create new theme: " + name);
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50
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51 Theme theme = new DefaultTheme(name, desc);
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52
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53 parseInherits(themeCfg, config, theme);
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54 parseFields(config, theme);
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55 parseAttrs(config, theme);
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56
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57 return theme;
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58 }
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59
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60
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61 /**
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62 * Get first matching theme for facet.
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63 *
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64 * @param name Name to match "from" of theme mapping.
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65 * @param pattern String to 'compare' to pattern in mapping.
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66 * @param output Name of the current output
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67 *
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68 * @return First matching theme.
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69 */
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70 public static Theme getTheme(
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71 FLYSContext c,
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72 String name,
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73 String pattern,
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74 String output,
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75 String groupName)
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76 {
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77 if (logger.isDebugEnabled()) {
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78 logger.debug(
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79 "Search theme for: " + name + " - pattern: " + pattern);
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80 }
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81
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82 if (c == null || name == null) {
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83 logger.warn("Cannot search for theme.");
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84 return null;
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85 }
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86
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87 // Fetch mapping and themes.
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88 @SuppressWarnings("unchecked")
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89 Map<String, List<ThemeMapping>> map = (Map<String, List<ThemeMapping>>)
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90 c.get(FLYSContext.THEME_MAPPING);
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91
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92 @SuppressWarnings("unchecked")
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93 List<ThemeGroup> tgs = (List<ThemeGroup>)
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94 c.get(FLYSContext.THEMES);
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95
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96 ThemeGroup group = null;
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97 for (ThemeGroup tg: tgs) {
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98 if (tg.getName().equals(groupName)) {
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99 group = tg;
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100 break;
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101 }
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102 }
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103
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104 if (group == null) {
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105 return null;
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106 }
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107
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108 Map<String, Theme> t = group.getThemes();
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109
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110 FLYSArtifact artifact = (FLYSArtifact) c.get(FLYSContext.ARTIFACT_KEY);
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111
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112 if (map == null || map.isEmpty() || t == null || t.isEmpty()) {
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113 logger.warn("No mappings or themes found. Cannot retrieve theme!");
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114 return null;
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115 }
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116
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117 List<ThemeMapping> mapping = map.get(name);
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118
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119 if (mapping == null) {
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120 logger.warn("No theme found for mapping: " + name);
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121 return null;
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122 }
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123
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124 // Take first mapping of which all conditions are satisfied.
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125 for (ThemeMapping tm: mapping) {
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126 if (name.equals(tm.getFrom())
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127 && tm.applyPattern(pattern)
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128 && tm.masterAttrMatches(artifact)
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129 && tm.outputMatches(output))
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130 {
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131 return t.get(tm.getTo());
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132 }
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133 }
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134
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135 String msg =
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136 "No theme found for '" + name +
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137 "' with pattern '" + pattern + "' and output " + output + ".";
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138
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139 logger.warn(msg);
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140
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141 return null;
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142 }
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143
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144
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145 @SuppressWarnings("unchecked")
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146 public static List<ThemeGroup> getThemeGroups(FLYSContext c) {
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147 List<ThemeGroup> tgs = (List<ThemeGroup>)
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148 c.get(FLYSContext.THEMES);
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149 return tgs;
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150 }
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151
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152
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153 @SuppressWarnings("unchecked")
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154 public static List<Theme> getThemes (FLYSContext c, String name) {
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155 List<ThemeGroup> tgs = (List<ThemeGroup>)
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156 c.get(FLYSContext.THEMES);
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157 if (tgs == null) {
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158 return null;
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159 }
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160
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161 List<Theme> themes = new ArrayList<Theme>();
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162 for (ThemeGroup tg: tgs) {
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163 themes.add(tg.getThemeByName(name));
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164 }
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165 return themes;
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166 }
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167
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168 protected static String getName(Node config) {
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169 return ((Element)config).getAttribute("name");
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170 }
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171
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172
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173 protected static String getDescription(Node config) {
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174 return ((Element)config).getAttribute("desc");
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175 }
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176
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177
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178 protected static void parseInherits(Document themeCfg, Node cfg, Theme t) {
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179 parseInherits(themeCfg, cfg, t, null);
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180 }
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181
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182 protected static void parseInherits(
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183 Document themeCfg,
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184 Node cfg,
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185 Theme t,
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186 Map<String, Node> themes
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187 ) {
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188 logger.debug("ThemeFactory.parseInherits");
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189
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190 NodeList inherits = ((Element)cfg).getElementsByTagName("inherit");
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191
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192 int num = inherits.getLength();
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193
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194 if (num == 0) {
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195 logger.debug("Theme does not inherit from other themes.");
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196 return;
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197 }
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198
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199 logger.debug("Theme inherits from " + num + " other themes.");
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200
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201 if (themes == null) {
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202 themes = buildThemeMap(themeCfg);
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203 }
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204
340
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205 for (int i = 0; i < num; i++) {
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206 Node inherit = inherits.item(i);
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207 String from = ((Element)inherit).getAttribute("from");
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208
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209 Node tmp = themes.get(from);
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210
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211 parseInherits(themeCfg, tmp, t, themes);
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212 parseFields(tmp, t);
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213 }
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214 }
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215
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216 protected static Map<String, Node> buildThemeMap(Document themeCfg) {
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217 Map<String, Node> map = new HashMap<String, Node>();
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218 String xpath = "/themes/themegroup/theme";
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219
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220 NodeList nodes = (NodeList)XMLUtils.xpath(
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diff changeset
221 themeCfg, xpath, XPathConstants.NODESET);
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222
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223 if (nodes != null) {
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224 for (int i = 0, N = nodes.getLength(); i < N; ++i) {
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225 Node node = nodes.item(i);
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226 String name = ((Element)node).getAttribute("name");
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227 map.put(name, node);
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228 }
340
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229 }
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230 return map;
340
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231 }
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232
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233
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234 protected static void parseFields(Node config, Theme theme) {
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235 if (config == null || theme == null) {
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236 logger.warn("Parsing fields without node or theme is senseless!");
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237 return;
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238 }
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239
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240 NodeList fields = ((Element)config).getElementsByTagName("field");
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241
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242 int num = fields.getLength();
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243
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244 logger.debug("Found " + num + " own fields in this theme.");
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245
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246 if (num == 0) {
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247 logger.debug("Theme has no own fields.");
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248 return;
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249 }
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250
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251 for (int i = 0; i < num; i++) {
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252 Node field = fields.item(i);
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253
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254 addField(theme, field);
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255 }
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256 }
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257
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258
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259 protected static void addField(Theme theme, Node field) {
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260 String name = ((Element)field).getAttribute("name");
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261
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262 logger.debug("Add field " + name + " to theme " + theme.getName());
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263
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264 NamedNodeMap attrs = field.getAttributes();
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265
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266 int num = attrs != null ? attrs.getLength() : 0;
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267
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268 if (num == 0) {
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269 logger.warn("This field has no attributes.");
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270 return;
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271 }
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272
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273 ThemeField theField = new DefaultThemeField(name);
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274
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275 for (int i = 0; i < num; i++) {
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276 Node attr = attrs.item(i);
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277
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278 String key = attr.getNodeName();
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279 String value = attr.getNodeValue();
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280
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281 theField.setAttribute(key, value);
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282 }
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283
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284 theme.addField(name, theField);
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285 }
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286
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287
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288 protected static void parseAttrs(Node config, Theme theme) {
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289 NamedNodeMap attrs = config.getAttributes();
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290
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291 int num = attrs != null ? attrs.getLength() : 0;
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292
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293 if (num == 0) {
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294 logger.debug("Theme has no attributes set.");
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295 return;
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296 }
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297
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298 for (int i = 0; i < num; i++) {
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299 Node attr = attrs.item(i);
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300
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301 String name = attr.getNodeName();
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302 String value = attr.getNodeValue();
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303
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304 theme.addAttribute(name, value);
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305 }
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306 }
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307 }
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308 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org